Science at a Distance

Mendelian Genetics

Mendelian Genetics - Topic Outline

Inheritance of Sex-Linked Traits

A female carrier of hemophilia x A male

A diagram of a Punnett Square showing the chromosomes involved in the inheritance of sex-linked traits.
The female had the genotype XHXh, and produced the two gametes seen at the left side of the diagram.
The male had the genotype XHY0, and produced the two gametes seen at the right side of the diagram.
The genotypes seen in the center of the square represent the possible genotypes of the F1 generation.
Two female offspring are produced for every two male offspring.
One male and one female offspring inherit normal genes.
One female is heterozygous for the hemophilia trait and is considered a carrier.
One male receives a damaged X-chromosome and inherits the condition known as hemophilia.

A male hemophiliac
Lecture Notes Mendelian Genetics - Topic Outline
Science at a Distance
© 1997, Professor John Blamire